Circuit connection for electrical apparatus.



P. MAQGAHAN. CIRCUIT CONNECTION FOR ELECTRICAL APPARATUS.

, APPLICATION FILED OGT.18, 1905. v 1,120,829, Patented Dec. 15, 1914.-

QM @ENTOE WITNESSES:

ATTORNEY sTATns PATENT orricn PAUL MACGAHAN', or PITTSBURGH, PENNSYLVANIA, assrsnon o WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, A ConronATroN or rnnnsvnvanm.

CIRCUIT CONNECTION FQR ELECTRICAL APPARATUS.

Specification of Letters Patent.

Patented Dec. 15, 1914.

' Application filed October 18, 1905. Serial no. 283,840.

To all whom it may concern:

Be it known that 1, PAUL MACGAHAN, a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Circuit Connections for Electrical Apparatus, of which the following is a specification.

My invention relates to electrical apparatus and particularly to circuit, connec tions therefor.

The object of my invention is to provide a simple, inexpensive and durable means for making electrical connection between the winding or windings of electrical apparatus and an external circuit and one whlch shall eiiectively exclude moisture, dust and other foreign matter from the casing in which the coils to which connection is made are located.

Figure 1 of the accompanying drawing is a view, mainly in section, of a portion of an electrical measuring instrument, and Fig. 2 is a view, in side elevation, of the terminal block, with the leading-in conductor in my section, my invention having, been developed for application to electrical measuring instruments and havin been practically applied thereto but without intention of necessarily limiting it to such specific use.

The casing 1 is shown as provided with an outlet portion 2 and as containing a laminated, ma gnetizable core 3 which is surrounded by a coil 4: to which connection is made from an external circuit. In order to make such connection and also to protect the coil and other devices which maybe included within the casing, I provide the parts which will be now described.

Fitted to the free end of a terminal wire 5, leading from the coil 4, is a tube 6, of

copper or other good-conducting, material and at a suitable point intermediate its ends, the tube is flattened as indicated at 7 in order that it may be accommodated to the space which it is designed to occupy and also in order that it may be readily bent vwithout injurious effect. The portion of the tube 6 beyond the bend 7 fits closely within a hollow terminal block 8 of suitable insulating material and its outer end is threaded to screw into the inner end of a metal tube or terminal sleeve 9 having a suitable internal thread. The tube or sleeve 9 is seated in a' corresponding recess or cavity in the outer end of the terminal block 8. The terminal block 8 makes a sufiiciently close fit within the portion 2 of the casing to insure its retention therein, and it has a shoulder 10 that fits closely against the outer end'of the portion 2. The inner end of the terminal block is provided with a recess or well 11 constituting anenlargement of the hole or passage contalning the conductor 6 from which 'rojects a recess or notch 11 to receive the attened portion 7 of the tube .6. The recess or well 11 may be filled with a body 11 of suitable material, as indicated in the drawing. A binding device 12 is provided with a threaded portion 13 that screws into the tube 9 and thus serves to suitably bind a wire that ma be coiled about it between the outer en 01' the tube and. the outer portion of the device 12.

It will be understood from the illustration and the foregoing description that the device is of simple and compact construction and that it may be utilized to readily eflect circuit connection between the win ing 4 and the external circuit and at the same time close the opening in the projection 2 to prevent the entrance of any foreign matter which might be injurious to the internal mechanism. 7

I claim as my invention:

1. An electrical connector comprisin an ing tube seated in its outer en a tubular bent flattened portion at the inner end of the block and having its outer end seated in the inner end of the conducting tube.

.2. An electrical connector comprising an insulating terminal block provided with a binding post at its outer end and having a tubular leading-in conductor that projects through it into. engagement with the bindin post and is flattened and angularly bent ad acent to the'inner end of the block.

3. A. terminal block, and a tubuiar leading-in conductor that projects into the block and has a flattened portion adjacent to the inner end of the block that is bent at an angle to the axis of the block.

'85 insulating terminal block havin a con uct- In testimony whereof, I have here unto subscribed my name this 13th day of Gotcber, 1905.

PAUL MACGAHAN. Witnesses:

S. M. TRUXAL, BIRNEY Hnms. 

